Do you know about the Antikythera Mechanism? I remember reading about it a few times, but recently found someone who made a working replica using Legos. It's not clear to me if it is merely a functional replica or if it also replicates the specific arrangement of gears – i.e., does it produce the results the original mechanism produced using modern gear arrangements, or does it use the actual reconstructed gear arrangements? I suspect the former, because I doubt there are Lego gears with the specific characteristics of the orginal mechanism.
[daily log: walking, 5.5 km]